The Card

Every HD 7770 we've looked at so far as opted for its own cooling design so this is the first time we've seen the reference cooler. We see a fan sit slightly off center and the typical black and red shroud surrounding it. The rest of the card sees a single 6-pin PCIe power connector at the rear while across the top we've got the typical single CrossFire connector.

Specifications

Being a reference card means we're of course dealing with reference clock speeds which can be seen below in the GPU-Z screenshot. That means on the core front, the card AMD are labeling as the "GHz Edition" comes with a 1GHz core clock.

As for the 1GB of GDDR5 memory running on that 128-bit memory bus, we can see that comes in at 4500MHz QDR.

Considering we've seen companies offer us 1120MHz and 1150MHz on the core and memory speeds exceeding 5000MHz QDR, we get a good sense of the overclocking abilities of the new model, when looking at the reference clocks.